Weighing-scale



(No Model.)

G. W. CRAIG.

WITNESSES: 4 g INVENTOE:

(SMM BY M n ATTORNEYS.

. NITED STATES PATENT OFFICE.

GEORGE W. CRAIG, OF GRIMMS LANDING, \VESI VIRGINIA.

WEIGHING-SCALE.

SPECIFICATION forming part of Letters Patent No. 336,472, dated February16. 1886.

Application filed November 4, 1885. Serial No. 181,851. (No model.)

.To aZZ whom it may concern.-

Be it known that I, GEORGE W. CRAIG, of Grimms Landing, in the county ofMason and State of West Virginia, have invented a new and usefulImprovement in Platform-Scales, of which the following is a description.

Figure 1 is a vertical longitudinal central section of the platform andlower casing; and Fig. 2 is a plan view of the same with the table andupper flexible cover removed, showing the lever and table-supportwithin.

The object of my invention is to provide a cheap, durable, simple, andaccurate construction of platform-scales; andit consists, chiefly, inthe combination, with the platform-box, of flexible top and bottom andasingle lever and bearing upon which is supported a frame that restsupon said lever, and is prevented from tilting or moving sidewise by theflexible top and bottom, but which is permitted to move up and down withthe lever by the flexibility of the top and bottom sections, ashereinafter fully described.

In the drawings, Arepresents the rectangular box-casing of theplatform-scales. Upon a support, a, at one end of this box-casing isheld one end of the single lever B, the other end of which projectsthrough a slot in the box-casing and is attached to the vertical rod 0,that extends up to the scale-beam and fastens thereto. On the singlelever, and resting upon the chisel-edge or pivot lug his a peculiarcast-iron supporting-frame, D D D that sustains in turn theweighing-table surface or platform P, upon which objects are to beplaced to be weighed. This frame consists of a short verticalstandard,D, which has a hole through it to receive the lever B, and which frameis formed with four radiallyprojecting arms,D, each braced by an arm, Drunning from the outer end of arm D to the lower end of the standard D.The top and bottom ends of this standard are formed with screw-stems cc, that pass through the flexible sheet-metal top and bottom sections EE, which latter are fastened to the edges of the box-casing. Theupturned outer ends, d, of the arms D are also arranged to pass throughholes 6, near the four corners of the platform, and these upturned endswith the stems 0 form a five-point support, upon which rests theweighing-table I. On the tenons 0, above and below the flexible sheets,are secured flat nuts that hold the frame D D securely to these sheets,the object of which latter is to permit a free up-and-down movementWithout any lateral displacement of frame D D, thus enabling me tobalance this frame upon a single lever with a single bearing, whichgreatly simplifies and cheapens the construction of the scales.

H H are two small jointed rods (one on each side of the lever) whichextend to the outer casing and prevent the lateral vibration of thelever in horizontal direction.

I are the supporting-wheels of the box-casing, which permit the scalesto be readily moved.

Having thus described my invention, what I claim as new is 1. In ascale, the combination of a casing provided with flexible sheet-metaltop and bottom and the weighing lever and table supports connectedrigidly to said flexible sheets and moving with the same, as and for thepurpose described.

2. A scale comprising a box-casing with a flexible top and bottom, asingle lever attached or supported upon the box-casing at one end andconnected to the scale-beam rod at the other, and asingle frame mountedupon this lever and connected at top and bottom, respectively, to theflexible top and bottom sheets, substantially as and for the purposedescribed.

3. The combination of the box-casing having a flexible sheet-metal topand bottom, the single lever B, hung at one end upon a projection fromthe casing and connected at the other to the scale-beam rod, and thesingle frame consisting of vertical standard D, with a hole through itto receive the lever B, and connected at top and bottom to the flexiblesheet at top and bottom, and provided with radial arms D D substantiallyas and for the purpose described.

GEORGE W. CRAIG.

Witnesses:

E. D. J EFFRIES, A. E. CRAIG.

